$ git clone -n https://src.fedoraproject.org/rpms/python-stdlib-list.git /var/lib/mock/f40-build-2090134-50219/root/chroot_tmpdir/scmroot/python-stdlib-list
Cloning into '/var/lib/mock/f40-build-2090134-50219/root/chroot_tmpdir/scmroot/python-stdlib-list'...
$ git fetch origin ce4e910babbe1b4be70e7c1bc52204d2c047a320:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-stdlib-list
 * [new ref]         ce4e910babbe1b4be70e7c1bc52204d2c047a320 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ce4e910 Update to 0.10.0 (close RHBZ#2250403)