$ git clone -n https://src.fedoraproject.org/rpms/golang-modernc-y.git /var/lib/mock/f40-build-2572344-62241/root/chroot_tmpdir/scmroot/golang-modernc-y
Cloning into '/var/lib/mock/f40-build-2572344-62241/root/chroot_tmpdir/scmroot/golang-modernc-y'...
$ git fetch origin f36f69afa8e34762ad084bcac1a7a7bcf8faacd3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-modernc-y
 * [new ref]         f36f69afa8e34762ad084bcac1a7a7bcf8faacd3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f36f69a Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild