$ git clone -n https://src.fedoraproject.org/rpms/umockdev.git /var/lib/mock/f41-build-side-1-3135061-39766/root/chroot_tmpdir/scmroot/umockdev
Cloning into '/var/lib/mock/f41-build-side-1-3135061-39766/root/chroot_tmpdir/scmroot/umockdev'...
$ git fetch origin 8d160a63769a873c72400a98263f1dcd0d54a694:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/umockdev
 * [new ref]         8d160a63769a873c72400a98263f1dcd0d54a694 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8d160a6 Update to 0.18.4 upstream release