$ git clone -n https://src.fedoraproject.org/rpms/libdb.git /var/lib/mock/f42-build-side-1-3522717-46188/root/chroot_tmpdir/scmroot/libdb
Cloning into '/var/lib/mock/f42-build-side-1-3522717-46188/root/chroot_tmpdir/scmroot/libdb'...
$ git fetch origin 2a5a03c5cecbe7ff82ad9de4bff09d9c05fa5bdc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libdb
 * [new ref]         2a5a03c5cecbe7ff82ad9de4bff09d9c05fa5bdc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2a5a03c Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild