$ git clone -n https://src.fedoraproject.org/rpms/libobjc2.git /var/lib/mock/f40-build-763384-122475/root/chroot_tmpdir/scmroot/libobjc2
Cloning into '/var/lib/mock/f40-build-763384-122475/root/chroot_tmpdir/scmroot/libobjc2'...
$ git fetch origin 9a4360dfc99b190b89733a68f3dc47b8f961bcbc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libobjc2
 * [new ref]         9a4360dfc99b190b89733a68f3dc47b8f961bcbc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9a4360d Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild