$ git clone -n https://src.fedoraproject.org/rpms/golang-modernc-mathutil.git /var/lib/mock/f39-build-1647423-40436/root/chroot_tmpdir/scmroot/golang-modernc-mathutil
Cloning into '/var/lib/mock/f39-build-1647423-40436/root/chroot_tmpdir/scmroot/golang-modernc-mathutil'...
$ git fetch origin 6325c74827d79bbfc9577c0c07294c834da2323e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-modernc-mathutil
 * [new ref]         6325c74827d79bbfc9577c0c07294c834da2323e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6325c74 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild