$ git clone -n https://src.fedoraproject.org/rpms/gfs2-utils.git /var/lib/mock/f45-build-9872-409/root/chroot_tmpdir/scmroot/gfs2-utils
Cloning into '/var/lib/mock/f45-build-9872-409/root/chroot_tmpdir/scmroot/gfs2-utils'...
$ git fetch origin b1b22f5fb207cbc312df9e61e13e890a28ae18bd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gfs2-utils
 * [new ref]         b1b22f5fb207cbc312df9e61e13e890a28ae18bd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b1b22f5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild