$ git clone -n https://src.fedoraproject.org/rpms/powerline.git /var/lib/mock/f40-build-2023917-46945/root/chroot_tmpdir/scmroot/powerline
Cloning into '/var/lib/mock/f40-build-2023917-46945/root/chroot_tmpdir/scmroot/powerline'...
$ git fetch origin 896ba385308f3d54f2dad70d5a859ecaa9f314a3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/powerline
 * [new ref]         896ba385308f3d54f2dad70d5a859ecaa9f314a3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 896ba38 Make summary and description of `fonts` subpackage more precise