$ git clone -n https://src.fedoraproject.org/rpms/libxmlb.git /var/lib/mock/f40-build-2295712-56337/root/chroot_tmpdir/scmroot/libxmlb
Cloning into '/var/lib/mock/f40-build-2295712-56337/root/chroot_tmpdir/scmroot/libxmlb'...
$ git fetch origin 4c588f122d95940ef093477dfdd973b4c0265356:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libxmlb
 * [new ref]         4c588f122d95940ef093477dfdd973b4c0265356 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4c588f1 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild