$ git clone -n https://src.fedoraproject.org/rpms/ghc-MissingH.git /var/lib/mock/f45-build-9922-411/root/chroot_tmpdir/scmroot/ghc-MissingH
Cloning into '/var/lib/mock/f45-build-9922-411/root/chroot_tmpdir/scmroot/ghc-MissingH'...
$ git fetch origin aef6b11d3558da4c2ee97429d3ab54e2f7acd4b2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-MissingH
 * [new ref]         aef6b11d3558da4c2ee97429d3ab54e2f7acd4b2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aef6b11 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild