$ git clone -n https://src.fedoraproject.org/rpms/jack-audio-connection-kit.git /var/lib/mock/f40-build-789056-135502/root/chroot_tmpdir/scmroot/jack-audio-connection-kit
Cloning into '/var/lib/mock/f40-build-789056-135502/root/chroot_tmpdir/scmroot/jack-audio-connection-kit'...
$ git fetch origin ab29637048c494962bf81d00cd1c9e16e19ea4c7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jack-audio-connection-kit
 * [new ref]         ab29637048c494962bf81d00cd1c9e16e19ea4c7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ab29637 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild