$ git clone -n https://src.fedoraproject.org/rpms/apache-commons-math.git /var/lib/mock/f40-build-2644875-66523/root/chroot_tmpdir/scmroot/apache-commons-math
Cloning into '/var/lib/mock/f40-build-2644875-66523/root/chroot_tmpdir/scmroot/apache-commons-math'...
$ git fetch origin 1399f4281710a5c446cabaa24d326a048eb8521b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/apache-commons-math
 * [new ref]         1399f4281710a5c446cabaa24d326a048eb8521b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1399f42 Rebuilt for java-21-openjdk as system jdk