$ git clone -n https://src.fedoraproject.org/rpms/mgetty.git /var/lib/mock/f45-build-18312-513/root/chroot_tmpdir/scmroot/mgetty
Cloning into '/var/lib/mock/f45-build-18312-513/root/chroot_tmpdir/scmroot/mgetty'...
$ git fetch origin f002d2a424303e6a00c1e00d4f244b05172a6c2c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mgetty
 * [new ref]         f002d2a424303e6a00c1e00d4f244b05172a6c2c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f002d2a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild