$ git clone -n https://src.fedoraproject.org/rpms/libdb.git /var/lib/mock/f39-build-1806339-41818/root/chroot_tmpdir/scmroot/libdb
Cloning into '/var/lib/mock/f39-build-1806339-41818/root/chroot_tmpdir/scmroot/libdb'...
$ git fetch origin 649a0fcb44d78be48cd877cbdae7f9a31cd725da:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libdb
 * [new ref]         649a0fcb44d78be48cd877cbdae7f9a31cd725da -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 649a0fc Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild