$ git clone -n https://src.fedoraproject.org/rpms/alglib.git /var/lib/mock/f39-build-1494462-34542/root/chroot_tmpdir/scmroot/alglib
Cloning into '/var/lib/mock/f39-build-1494462-34542/root/chroot_tmpdir/scmroot/alglib'...
$ git fetch origin 5071c55035f8c7ed0cbbe7c17cf8eb4b7339fda7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/alglib
 * [new ref]         5071c55035f8c7ed0cbbe7c17cf8eb4b7339fda7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5071c55 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild