$ git clone -n https://src.fedoraproject.org/rpms/plasma5support.git /var/lib/mock/f41-build-824401-154063/root/chroot_tmpdir/scmroot/plasma5support
Cloning into '/var/lib/mock/f41-build-824401-154063/root/chroot_tmpdir/scmroot/plasma5support'...
$ git fetch origin d9b812d24490c9babe6bedf5d344c09bcf25f53b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma5support
 * [new ref]         d9b812d24490c9babe6bedf5d344c09bcf25f53b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d9b812d rebuild