$ git clone -n https://src.fedoraproject.org/rpms/breeze-gtk.git /var/lib/mock/f40-build-2184789-51282/root/chroot_tmpdir/scmroot/breeze-gtk
Cloning into '/var/lib/mock/f40-build-2184789-51282/root/chroot_tmpdir/scmroot/breeze-gtk'...
$ git fetch origin 50984d1a3052f7ff28823c0a7a5e06c4f2c74fa4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/breeze-gtk
 * [new ref]         50984d1a3052f7ff28823c0a7a5e06c4f2c74fa4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 50984d1 5.91.0