$ git clone -n https://src.fedoraproject.org/rpms/librsvg2.git /var/lib/mock/f41-build-810476-146718/root/chroot_tmpdir/scmroot/librsvg2
Cloning into '/var/lib/mock/f41-build-810476-146718/root/chroot_tmpdir/scmroot/librsvg2'...
$ git fetch origin 57c7aa0e36709f00bc306bb396f2c9b38218dead:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/librsvg2
 * [new ref]         57c7aa0e36709f00bc306bb396f2c9b38218dead -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 57c7aa0 Upgrade dependency lopdf to 0.32; fixes rhbz#2274029