$ git clone -n https://src.fedoraproject.org/rpms/golang-github-pkg-browser.git /var/lib/mock/f40-build-2001817-44631/root/chroot_tmpdir/scmroot/golang-github-pkg-browser
Cloning into '/var/lib/mock/f40-build-2001817-44631/root/chroot_tmpdir/scmroot/golang-github-pkg-browser'...
$ git fetch origin 9af6d40e4e10a22204971d41d5a87a2761f0bd2e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-pkg-browser
 * [new ref]         9af6d40e4e10a22204971d41d5a87a2761f0bd2e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9af6d40 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild