$ git clone -n https://src.fedoraproject.org/rpms/ghc-base-orphans.git /var/lib/mock/f45-build-10004-412/root/chroot_tmpdir/scmroot/ghc-base-orphans
Cloning into '/var/lib/mock/f45-build-10004-412/root/chroot_tmpdir/scmroot/ghc-base-orphans'...
$ git fetch origin 5da87c3817d7e0d4f6d60cf5e0f7b35e6fba6c09:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-base-orphans
 * [new ref]         5da87c3817d7e0d4f6d60cf5e0f7b35e6fba6c09 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5da87c3 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild