$ git clone -n https://src.fedoraproject.org/rpms/samefile.git /var/lib/mock/f45-build-35551-696/root/chroot_tmpdir/scmroot/samefile
Cloning into '/var/lib/mock/f45-build-35551-696/root/chroot_tmpdir/scmroot/samefile'...
$ git fetch origin 115dde6377aa79ce2d1529d835cc9d51e597e7a5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/samefile
 * [new ref]         115dde6377aa79ce2d1529d835cc9d51e597e7a5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 115dde6 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild