$ git clone -n https://src.fedoraproject.org/rpms/python-zlib-ng.git /var/lib/mock/f41-build-side-1-2871229-34324/root/chroot_tmpdir/scmroot/python-zlib-ng
Cloning into '/var/lib/mock/f41-build-side-1-2871229-34324/root/chroot_tmpdir/scmroot/python-zlib-ng'...
$ git fetch origin 7e2e09dbd68f6d0b7ecc9df9f6cb345a8474c452:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-zlib-ng
 * [new ref]         7e2e09dbd68f6d0b7ecc9df9f6cb345a8474c452 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7e2e09d Update to 0.5.1 upstream release