$ git clone -n https://src.fedoraproject.org/rpms/ghc-th-orphans.git /var/lib/mock/f45-build-10865-424/root/chroot_tmpdir/scmroot/ghc-th-orphans
Cloning into '/var/lib/mock/f45-build-10865-424/root/chroot_tmpdir/scmroot/ghc-th-orphans'...
$ git fetch origin 7d683efc235e1adf5a1e7a28e1dcfcc1c156c2bb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-th-orphans
 * [new ref]         7d683efc235e1adf5a1e7a28e1dcfcc1c156c2bb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7d683ef Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild