$ git clone -n https://src.fedoraproject.org/rpms/fotoxx.git /var/lib/mock/f40-build-1996716-44049/root/chroot_tmpdir/scmroot/fotoxx
Cloning into '/var/lib/mock/f40-build-1996716-44049/root/chroot_tmpdir/scmroot/fotoxx'...
$ git fetch origin aa57e0cab38db54a2098c8bdf1f9c19ec92a1bdf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fotoxx
 * [new ref]         aa57e0cab38db54a2098c8bdf1f9c19ec92a1bdf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aa57e0c 23.80