$ git clone -n https://src.fedoraproject.org/rpms/md4c.git /var/lib/mock/f38-build-side-42-init-devel-1407742-31352/root/chroot_tmpdir/scmroot/md4c
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1407742-31352/root/chroot_tmpdir/scmroot/md4c'...
$ git fetch origin d73cd88f31717de970afd94cfa7f206e81fa8be1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/md4c
 * [new ref]         d73cd88f31717de970afd94cfa7f206e81fa8be1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d73cd88 Initial import BZ2227454