$ git clone -n https://src.fedoraproject.org/rpms/rust-rutabaga_gfx.git /var/lib/mock/f45-build-44625-815/root/chroot_tmpdir/scmroot/rust-rutabaga_gfx
Cloning into '/var/lib/mock/f45-build-44625-815/root/chroot_tmpdir/scmroot/rust-rutabaga_gfx'...
$ git fetch origin d807d0341ee8ed4b47d5abbba66ae28bc57f4f5a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rutabaga_gfx
 * [new ref]         d807d0341ee8ed4b47d5abbba66ae28bc57f4f5a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d807d03 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild