$ git clone -n https://src.fedoraproject.org/rpms/debbuild.git /var/lib/mock/f39-build-1458062-33035/root/chroot_tmpdir/scmroot/debbuild
Cloning into '/var/lib/mock/f39-build-1458062-33035/root/chroot_tmpdir/scmroot/debbuild'...
$ git fetch origin 95447a64c55a4ae1d140f046484e7872d0259c3d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/debbuild
 * [new ref]         95447a64c55a4ae1d140f046484e7872d0259c3d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 95447a6 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild