$ git clone -n https://src.fedoraproject.org/rpms/breeze-gtk.git /var/lib/mock/f40-build-2534010-61848/root/chroot_tmpdir/scmroot/breeze-gtk
Cloning into '/var/lib/mock/f40-build-2534010-61848/root/chroot_tmpdir/scmroot/breeze-gtk'...
$ git fetch origin f8f6e75801582fbf3bbb01fd38a2fb5ce006eeaa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/breeze-gtk
 * [new ref]         f8f6e75801582fbf3bbb01fd38a2fb5ce006eeaa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f8f6e75 6.0.1