$ git clone -n https://src.fedoraproject.org/rpms/ghc-gi-gdk.git /var/lib/mock/f45-build-10314-415/root/chroot_tmpdir/scmroot/ghc-gi-gdk
Cloning into '/var/lib/mock/f45-build-10314-415/root/chroot_tmpdir/scmroot/ghc-gi-gdk'...
$ git fetch origin 64a5316ae272d18506f7a7c0d201e090867de09f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-gi-gdk
 * [new ref]         64a5316ae272d18506f7a7c0d201e090867de09f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 64a5316 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild