$ git clone -n https://src.fedoraproject.org/rpms/python-tblib.git /var/lib/mock/f39-build-1426388-31595/root/chroot_tmpdir/scmroot/python-tblib
Cloning into '/var/lib/mock/f39-build-1426388-31595/root/chroot_tmpdir/scmroot/python-tblib'...
$ git fetch origin 84e3a3115672d252d62c7ad3141112a6c9cea440:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-tblib
 * [new ref]         84e3a3115672d252d62c7ad3141112a6c9cea440 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 84e3a31 Update to latest version (#2216696)