$ git clone -n https://src.fedoraproject.org/rpms/util-linux.git /var/lib/mock/f42-build-861853-170452/root/chroot_tmpdir/scmroot/util-linux
Cloning into '/var/lib/mock/f42-build-861853-170452/root/chroot_tmpdir/scmroot/util-linux'...
$ git fetch origin 61d2c55ceb565b0fdc391aded5bd9af71ca026ec:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/util-linux
 * [new ref]         61d2c55ceb565b0fdc391aded5bd9af71ca026ec -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 61d2c55 improve util-linux-script subpackage