$ git clone -n https://src.fedoraproject.org/rpms/python-pygit2.git /var/lib/mock/f41-build-847819-164127/root/chroot_tmpdir/scmroot/python-pygit2
Cloning into '/var/lib/mock/f41-build-847819-164127/root/chroot_tmpdir/scmroot/python-pygit2'...
$ git fetch origin 2f5887037aeeea17bd79b862c447581f4b6f9f38:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-pygit2
 * [new ref]         2f5887037aeeea17bd79b862c447581f4b6f9f38 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2f58870 Update to 1.15.1 (rhbz#2263660)