$ git clone -n https://src.fedoraproject.org/rpms/xdg-desktop-portal-cosmic.git /var/lib/mock/f41-build-side-1-3108658-39383/root/chroot_tmpdir/scmroot/xdg-desktop-portal-cosmic
Cloning into '/var/lib/mock/f41-build-side-1-3108658-39383/root/chroot_tmpdir/scmroot/xdg-desktop-portal-cosmic'...
$ git fetch origin cccfd0480c71c88bafe53792885c6f7dad042336:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xdg-desktop-portal-cosmic
 * [new ref]         cccfd0480c71c88bafe53792885c6f7dad042336 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cccfd04 "Update to 1.0.0~alpha.3"