$ git clone -n https://src.fedoraproject.org/rpms/gdb.git /var/lib/mock/f41-build-810855-147007/root/chroot_tmpdir/scmroot/gdb
Cloning into '/var/lib/mock/f41-build-810855-147007/root/chroot_tmpdir/scmroot/gdb'...
$ git fetch origin 16722914d913c6e7475cba5cef63a5e7bd33f29b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gdb
 * [new ref]         16722914d913c6e7475cba5cef63a5e7bd33f29b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1672291 Catch ModuleNotFoundError in rpm-suggestions.py