$ git clone -n https://src.fedoraproject.org/rpms/vdr-graphlcd.git /var/lib/mock/f45-build-37989-719/root/chroot_tmpdir/scmroot/vdr-graphlcd
Cloning into '/var/lib/mock/f45-build-37989-719/root/chroot_tmpdir/scmroot/vdr-graphlcd'...
$ git fetch origin 0c6f61bffc1058d40773ebed5d53d84eb537d2cb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vdr-graphlcd
 * [new ref]         0c6f61bffc1058d40773ebed5d53d84eb537d2cb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0c6f61b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild