$ git clone -n https://src.fedoraproject.org/rpms/reposurgeon.git /var/lib/mock/f38-build-side-42-init-devel-949620-28779/root/chroot_tmpdir/scmroot/reposurgeon
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-949620-28779/root/chroot_tmpdir/scmroot/reposurgeon'...
$ git fetch origin 202d4c41c24f8b1a3be626820da13f75f2f15a86:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/reposurgeon
 * [new ref]         202d4c41c24f8b1a3be626820da13f75f2f15a86 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 202d4c4 reposurgeon: 4.35 release