$ git clone -n https://src.fedoraproject.org/rpms/cockpit.git /var/lib/mock/f40-build-801283-143750/root/chroot_tmpdir/scmroot/cockpit
Cloning into '/var/lib/mock/f40-build-801283-143750/root/chroot_tmpdir/scmroot/cockpit'...
$ git fetch origin 4474abcf926c5649de7a96ea3451142b2fe05b27:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cockpit
 * [new ref]         4474abcf926c5649de7a96ea3451142b2fe05b27 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4474abc [packit] 314 upstream release