$ git clone -n https://src.fedoraproject.org/rpms/rust-curl.git /var/lib/mock/f42-build-61031287-6587920/root/chroot_tmpdir/scmroot/rust-curl
Cloning into '/var/lib/mock/f42-build-61031287-6587920/root/chroot_tmpdir/scmroot/rust-curl'...
$ git fetch origin 7f0f93ecd33b87c85f5678521e801aff2b3c0d62:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-curl
 * [new ref]         7f0f93ecd33b87c85f5678521e801aff2b3c0d62 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7f0f93e Update to version 0.4.48; Fixes RHBZ#2370910