$ git clone -n https://src.fedoraproject.org/rpms/python-crc32c.git /var/lib/mock/f41-build-847626-163991/root/chroot_tmpdir/scmroot/python-crc32c
Cloning into '/var/lib/mock/f41-build-847626-163991/root/chroot_tmpdir/scmroot/python-crc32c'...
$ git fetch origin cde8f5746745968738022d8cec27ea163183276e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-crc32c
 * [new ref]         cde8f5746745968738022d8cec27ea163183276e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cde8f57 Fix source checksum file for 2.7.post1