$ git clone -n https://src.fedoraproject.org/rpms/xdg-desktop-portal.git /var/lib/mock/f42-build-3352858-45016/root/chroot_tmpdir/scmroot/xdg-desktop-portal
Cloning into '/var/lib/mock/f42-build-3352858-45016/root/chroot_tmpdir/scmroot/xdg-desktop-portal'...
$ git fetch origin 3dab6e49c839d40f6e7e38106473e40c1fe93204:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xdg-desktop-portal
 * [new ref]         3dab6e49c839d40f6e7e38106473e40c1fe93204 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3dab6e4 Update to 1.19.2