$ git clone -n https://src.fedoraproject.org/rpms/signon-plugin-oauth2.git /var/lib/mock/f40-build-2233401-53375/root/chroot_tmpdir/scmroot/signon-plugin-oauth2
Cloning into '/var/lib/mock/f40-build-2233401-53375/root/chroot_tmpdir/scmroot/signon-plugin-oauth2'...
$ git fetch origin 4d9e31d853b1ba4a43750e2e6ed035d05c69e7c7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/signon-plugin-oauth2
 * [new ref]         4d9e31d853b1ba4a43750e2e6ed035d05c69e7c7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4d9e31d Build from git snapshot for qt6