$ git clone -n https://src.fedoraproject.org/rpms/ghc-shakespeare.git /var/lib/mock/f45-build-10755-424/root/chroot_tmpdir/scmroot/ghc-shakespeare
Cloning into '/var/lib/mock/f45-build-10755-424/root/chroot_tmpdir/scmroot/ghc-shakespeare'...
$ git fetch origin e6848f4d0aa443c694865646fbb1ce4f7f498bc2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-shakespeare
 * [new ref]         e6848f4d0aa443c694865646fbb1ce4f7f498bc2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e6848f4 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild