$ git clone -n https://src.fedoraproject.org/rpms/tre.git /var/lib/mock/f41-build-725867-13123/root/chroot_tmpdir/scmroot/tre
Cloning into '/var/lib/mock/f41-build-725867-13123/root/chroot_tmpdir/scmroot/tre'...
$ git fetch origin 450eef0fd6f9949e257d896bb06d5b515c247735:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tre
 * [new ref]         450eef0fd6f9949e257d896bb06d5b515c247735 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 450eef0 Eliminate use of obsolete %patchN syntax (#2283636)