$ git clone -n https://src.fedoraproject.org/rpms/ghc-th-compat.git /var/lib/mock/f45-build-10861-424/root/chroot_tmpdir/scmroot/ghc-th-compat
Cloning into '/var/lib/mock/f45-build-10861-424/root/chroot_tmpdir/scmroot/ghc-th-compat'...
$ git fetch origin cc6f4d0e685b17e01b7d378fe23220cd19823256:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-th-compat
 * [new ref]         cc6f4d0e685b17e01b7d378fe23220cd19823256 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cc6f4d0 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild