$ git clone -n https://src.fedoraproject.org/rpms/ghc-RSA.git /var/lib/mock/f45-build-9937-411/root/chroot_tmpdir/scmroot/ghc-RSA
Cloning into '/var/lib/mock/f45-build-9937-411/root/chroot_tmpdir/scmroot/ghc-RSA'...
$ git fetch origin 9a6d1155e0141448969984802916f99cc515b1ad:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-RSA
 * [new ref]         9a6d1155e0141448969984802916f99cc515b1ad -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9a6d115 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild