$ git clone -n https://src.fedoraproject.org/rpms/khelpcenter.git /var/lib/mock/f38-build-side-42-init-devel-677298-26692/root/chroot_tmpdir/scmroot/khelpcenter
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-677298-26692/root/chroot_tmpdir/scmroot/khelpcenter'...
$ git fetch origin 62012e19fa63fc8990de3ec0b260580743b2fe39:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/khelpcenter
 * [new ref]         62012e19fa63fc8990de3ec0b260580743b2fe39 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 62012e1 Rebuild (grantlee-qt5)