$ git clone -n https://src.fedoraproject.org/rpms/apache-commons-math.git /var/lib/mock/f39-build-1840499-41979/root/chroot_tmpdir/scmroot/apache-commons-math
Cloning into '/var/lib/mock/f39-build-1840499-41979/root/chroot_tmpdir/scmroot/apache-commons-math'...
$ git fetch origin 126c60edbf36b1dffae4ad936913bfe391562801:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/apache-commons-math
 * [new ref]         126c60edbf36b1dffae4ad936913bfe391562801 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 126c60e Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild