$ git clone -n https://src.fedoraproject.org/rpms/xdg-desktop-portal.git /var/lib/mock/f39-build-1577776-37975/root/chroot_tmpdir/scmroot/xdg-desktop-portal
Cloning into '/var/lib/mock/f39-build-1577776-37975/root/chroot_tmpdir/scmroot/xdg-desktop-portal'...
$ git fetch origin db2359642f94acd62428ee954d55eb1c3c943bd3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xdg-desktop-portal
 * [new ref]         db2359642f94acd62428ee954d55eb1c3c943bd3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at db23596 Update to 1.18.1