$ git clone -n https://src.fedoraproject.org/rpms/grub2-breeze-theme.git /var/lib/mock/f45-build-13054-446/root/chroot_tmpdir/scmroot/grub2-breeze-theme
Cloning into '/var/lib/mock/f45-build-13054-446/root/chroot_tmpdir/scmroot/grub2-breeze-theme'...
$ git fetch origin 10d674968e3df6948bc3f983ed02275bbff5c851:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/grub2-breeze-theme
 * [new ref]         10d674968e3df6948bc3f983ed02275bbff5c851 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 10d6749 6.7.5