$ git clone -n https://src.fedoraproject.org/rpms/crun-vm.git /var/lib/mock/f40-build-1615968-24080/root/chroot_tmpdir/scmroot/crun-vm
Cloning into '/var/lib/mock/f40-build-1615968-24080/root/chroot_tmpdir/scmroot/crun-vm'...
$ git fetch origin 91ec40add21277a6d65f280a63e4b8bfe026f776:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/crun-vm
 * [new ref]         91ec40add21277a6d65f280a63e4b8bfe026f776 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 91ec40a Update to 0.2.0