$ git clone -n https://src.fedoraproject.org/rpms/tiosmod.git /var/lib/mock/f38-build-side-42-init-devel-1407199-31285/root/chroot_tmpdir/scmroot/tiosmod
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1407199-31285/root/chroot_tmpdir/scmroot/tiosmod'...
$ git fetch origin dc0df27f7c3d516df5a7b2e1f4e4221033d172a0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tiosmod
 * [new ref]         dc0df27f7c3d516df5a7b2e1f4e4221033d172a0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dc0df27 Initial import; Fixes: RHBZ#2107910