$ git clone -n https://src.fedoraproject.org/rpms/libdb.git /var/lib/mock/f40-build-785883-134131/root/chroot_tmpdir/scmroot/libdb
Cloning into '/var/lib/mock/f40-build-785883-134131/root/chroot_tmpdir/scmroot/libdb'...
$ git fetch origin b5918f0fb37e5ee3a25f3a223550b82ee2f815af:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libdb
 * [new ref]         b5918f0fb37e5ee3a25f3a223550b82ee2f815af -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b5918f0 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild