$ git clone -n https://src.fedoraproject.org/rpms/python-inject.git /var/lib/mock/f40-build-2213767-52348/root/chroot_tmpdir/scmroot/python-inject
Cloning into '/var/lib/mock/f40-build-2213767-52348/root/chroot_tmpdir/scmroot/python-inject'...
$ git fetch origin 938e7e0d365be05344b228c4e08ea83dba364fc5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-inject
 * [new ref]         938e7e0d365be05344b228c4e08ea83dba364fc5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 938e7e0 Update to v5.2.0 (rhbz#2251148)