$ git clone -n https://src.fedoraproject.org/rpms/alsa-tools.git /var/lib/mock/f40-build-2430734-60609/root/chroot_tmpdir/scmroot/alsa-tools
Cloning into '/var/lib/mock/f40-build-2430734-60609/root/chroot_tmpdir/scmroot/alsa-tools'...
$ git fetch origin ffcb3cb8feb9035ee215b2b9af5bfe45b5b8be4d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/alsa-tools
 * [new ref]         ffcb3cb8feb9035ee215b2b9af5bfe45b5b8be4d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ffcb3cb remove c99 patch (obsolete)