$ git clone -n https://src.fedoraproject.org/rpms/python-icalendar.git /var/lib/mock/f39-build-1427467-31631/root/chroot_tmpdir/scmroot/python-icalendar
Cloning into '/var/lib/mock/f39-build-1427467-31631/root/chroot_tmpdir/scmroot/python-icalendar'...
$ git fetch origin d930a24dc980ac4a6e88f92cef81b0fc37fc4f46:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-icalendar
 * [new ref]         d930a24dc980ac4a6e88f92cef81b0fc37fc4f46 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d930a24 5.0.10