$ git clone -n https://src.fedoraproject.org/rpms/librsvg2.git /var/lib/mock/f40-build-2506136-61702/root/chroot_tmpdir/scmroot/librsvg2
Cloning into '/var/lib/mock/f40-build-2506136-61702/root/chroot_tmpdir/scmroot/librsvg2'...
$ git fetch origin 96981de9022282ed467ab49618a38895f0d8c3ef:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/librsvg2
 * [new ref]         96981de9022282ed467ab49618a38895f0d8c3ef -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 96981de Update Rust macro usage