$ git clone -n https://src.fedoraproject.org/rpms/isis.git /var/lib/mock/f38-build-side-42-init-devel-772967-27763/root/chroot_tmpdir/scmroot/isis
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-772967-27763/root/chroot_tmpdir/scmroot/isis'...
$ git fetch origin 879e8b4b54746b2484cce5752f3025e3d0cc9b61:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/isis
 * [new ref]         879e8b4b54746b2484cce5752f3025e3d0cc9b61 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 879e8b4 Initial setup of the repo