$ git clone -n https://src.fedoraproject.org/rpms/ghc-http-media.git /var/lib/mock/f45-build-10417-416/root/chroot_tmpdir/scmroot/ghc-http-media
Cloning into '/var/lib/mock/f45-build-10417-416/root/chroot_tmpdir/scmroot/ghc-http-media'...
$ git fetch origin 0965a9b466cc254b72bc53c33d9721665f6139e2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-http-media
 * [new ref]         0965a9b466cc254b72bc53c33d9721665f6139e2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0965a9b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild