$ git clone -n https://src.fedoraproject.org/rpms/human-theme-gtk.git /var/lib/mock/f42-build-side-1-3534652-46551/root/chroot_tmpdir/scmroot/human-theme-gtk
Cloning into '/var/lib/mock/f42-build-side-1-3534652-46551/root/chroot_tmpdir/scmroot/human-theme-gtk'...
$ git fetch origin f4cfc2b1dd84ae51bfb268739b353a6af61b3494:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/human-theme-gtk
 * [new ref]         f4cfc2b1dd84ae51bfb268739b353a6af61b3494 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f4cfc2b New upstream release: 2.5.0