$ git clone -n https://src.fedoraproject.org/rpms/librsvg2.git /var/lib/mock/f42-build-side-1-3588632-46948/root/chroot_tmpdir/scmroot/librsvg2
Cloning into '/var/lib/mock/f42-build-side-1-3588632-46948/root/chroot_tmpdir/scmroot/librsvg2'...
$ git fetch origin 3dade0df8517dd278311356c9cf8f32859924d81:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/librsvg2
 * [new ref]         3dade0df8517dd278311356c9cf8f32859924d81 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3dade0d Update to 2.60.0 and enable AVIF support on Fedora