$ git clone -n https://src.fedoraproject.org/rpms/ghc-tagged.git /var/lib/mock/f45-build-10823-424/root/chroot_tmpdir/scmroot/ghc-tagged
Cloning into '/var/lib/mock/f45-build-10823-424/root/chroot_tmpdir/scmroot/ghc-tagged'...
$ git fetch origin 9e832a3ab4a922026443bf12f3b5ce210b6381fc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-tagged
 * [new ref]         9e832a3ab4a922026443bf12f3b5ce210b6381fc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9e832a3 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild