$ git clone -n https://src.fedoraproject.org/rpms/aws-c-mqtt.git /var/lib/mock/epel8-build-side-110110-58874351-6568874/root/chroot_tmpdir/scmroot/aws-c-mqtt
Cloning into '/var/lib/mock/epel8-build-side-110110-58874351-6568874/root/chroot_tmpdir/scmroot/aws-c-mqtt'...
$ git fetch origin 4542373e772f49dc518f6fab69c29ef5fa93b783:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/aws-c-mqtt
 * [new ref]         4542373e772f49dc518f6fab69c29ef5fa93b783 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4542373 fix: Patch 'aws-c-mqtt-cmake.patch' removed, not needed anymore, included upstream