$ git clone -n https://src.fedoraproject.org/rpms/breeze-gtk.git /var/lib/mock/f39-build-1629309-39541/root/chroot_tmpdir/scmroot/breeze-gtk
Cloning into '/var/lib/mock/f39-build-1629309-39541/root/chroot_tmpdir/scmroot/breeze-gtk'...
$ git fetch origin 513ffa9567af38de14cd14eec35401ea8d466b8b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/breeze-gtk
 * [new ref]         513ffa9567af38de14cd14eec35401ea8d466b8b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 513ffa9 5.27.9