$ git clone -n https://src.fedoraproject.org/rpms/tng.git /var/lib/mock/f41-build-725853-13123/root/chroot_tmpdir/scmroot/tng
Cloning into '/var/lib/mock/f41-build-725853-13123/root/chroot_tmpdir/scmroot/tng'...
$ git fetch origin 3e9215d2e955577245e891fa8bfe57182b611535:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tng
 * [new ref]         3e9215d2e955577245e891fa8bfe57182b611535 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3e9215d Eliminate use of obsolete %patchN syntax (#2283636)