$ git clone -n https://src.fedoraproject.org/rpms/ghc-gi-gtk3.git /var/lib/mock/f45-build-10340-415/root/chroot_tmpdir/scmroot/ghc-gi-gtk3
Cloning into '/var/lib/mock/f45-build-10340-415/root/chroot_tmpdir/scmroot/ghc-gi-gtk3'...
$ git fetch origin 297d141595dd44e29cf5d505cbe7c66986660b1f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-gi-gtk3
 * [new ref]         297d141595dd44e29cf5d505cbe7c66986660b1f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 297d141 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild