$ git clone -n https://src.fedoraproject.org/rpms/trac.git /var/lib/mock/f39-build-1500409-34787/root/chroot_tmpdir/scmroot/trac
Cloning into '/var/lib/mock/f39-build-1500409-34787/root/chroot_tmpdir/scmroot/trac'...
$ git fetch origin f9cf906858364a51fc257f4bedec6224821f4650:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/trac
 * [new ref]         f9cf906858364a51fc257f4bedec6224821f4650 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f9cf906 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild