$ git clone -n https://src.fedoraproject.org/rpms/cockpit.git /var/lib/mock/f39-build-1503196-34964/root/chroot_tmpdir/scmroot/cockpit
Cloning into '/var/lib/mock/f39-build-1503196-34964/root/chroot_tmpdir/scmroot/cockpit'...
$ git fetch origin 758b5c6e9939601d7acbdb3d681d0a75c772b7c9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cockpit
 * [new ref]         758b5c6e9939601d7acbdb3d681d0a75c772b7c9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 758b5c6 [packit] 303 upstream release