$ git clone -n https://src.fedoraproject.org/rpms/python-pipdeptree.git /var/lib/mock/f42-build-side-1-3500286-45970/root/chroot_tmpdir/scmroot/python-pipdeptree
Cloning into '/var/lib/mock/f42-build-side-1-3500286-45970/root/chroot_tmpdir/scmroot/python-pipdeptree'...
$ git fetch origin b8552830fab2cd13215b068a2ddf4ed0d7ce101c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-pipdeptree
 * [new ref]         b8552830fab2cd13215b068a2ddf4ed0d7ce101c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b855283 Update to 2.25.1 (rhbz#2351431)