$ git clone -n https://src.fedoraproject.org/rpms/otter-browser.git /var/lib/mock/f42-build-3348064-45005/root/chroot_tmpdir/scmroot/otter-browser
Cloning into '/var/lib/mock/f42-build-3348064-45005/root/chroot_tmpdir/scmroot/otter-browser'...
$ git fetch origin 684ef81b807d49b615787f692ba04975a417bc3d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/otter-browser
 * [new ref]         684ef81b807d49b615787f692ba04975a417bc3d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 684ef81 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild