$ git clone -n https://src.fedoraproject.org/rpms/flamethrower.git /var/lib/mock/f45-build-9005-397/root/chroot_tmpdir/scmroot/flamethrower
Cloning into '/var/lib/mock/f45-build-9005-397/root/chroot_tmpdir/scmroot/flamethrower'...
$ git fetch origin 57d38a7a07944da9bf84b929034b678b7fd35f71:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/flamethrower
 * [new ref]         57d38a7a07944da9bf84b929034b678b7fd35f71 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 57d38a7 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild