$ git clone -n https://src.fedoraproject.org/rpms/xdg-desktop-portal-xapp.git /var/lib/mock/f42-build-side-1-3555817-46656/root/chroot_tmpdir/scmroot/xdg-desktop-portal-xapp
Cloning into '/var/lib/mock/f42-build-side-1-3555817-46656/root/chroot_tmpdir/scmroot/xdg-desktop-portal-xapp'...
$ git fetch origin b1863579e9fcc5f64cb60b6b5afcea4f5414501f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xdg-desktop-portal-xapp
 * [new ref]         b1863579e9fcc5f64cb60b6b5afcea4f5414501f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b186357 Update to 1.1.1