$ git clone -n https://src.fedoraproject.org/rpms/python-tinydb.git /var/lib/mock/f40-build-2204486-51961/root/chroot_tmpdir/scmroot/python-tinydb
Cloning into '/var/lib/mock/f40-build-2204486-51961/root/chroot_tmpdir/scmroot/python-tinydb'...
$ git fetch origin d4f3bdc207b9cca511e5c583cd80912de5f13136:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-tinydb
 * [new ref]         d4f3bdc207b9cca511e5c583cd80912de5f13136 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d4f3bdc add 4.8.0 source