$ git clone -n https://src.fedoraproject.org/forks/dcavalca/rpms/ModemManager.git /var/lib/mock/f43-build-61018557-6587765/root/chroot_tmpdir/scmroot/ModemManager
Cloning into '/var/lib/mock/f43-build-61018557-6587765/root/chroot_tmpdir/scmroot/ModemManager'...
$ git fetch origin 529761601fd8c22da53e0a64ed2d010ff9f3e302:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/forks/dcavalca/rpms/ModemManager
 * [new ref]         529761601fd8c22da53e0a64ed2d010ff9f3e302 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5297616 Update to 1.24.0; Fixes: RHBZ#2360675