$ git clone -n https://src.fedoraproject.org/rpms/ghc-HSH.git /var/lib/mock/f45-build-9899-411/root/chroot_tmpdir/scmroot/ghc-HSH
Cloning into '/var/lib/mock/f45-build-9899-411/root/chroot_tmpdir/scmroot/ghc-HSH'...
$ git fetch origin 534501eab0298ede27f44fbd283fb7ae675adc22:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-HSH
 * [new ref]         534501eab0298ede27f44fbd283fb7ae675adc22 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 534501e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild