$ git clone -n https://src.fedoraproject.org/rpms/librsvg2.git /var/lib/mock/f45-build-42212-791/root/chroot_tmpdir/scmroot/librsvg2
Cloning into '/var/lib/mock/f45-build-42212-791/root/chroot_tmpdir/scmroot/librsvg2'...
$ git fetch origin 02938be43381c0aa1f7eeac5102857aef03365fd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/librsvg2
 * [new ref]         02938be43381c0aa1f7eeac5102857aef03365fd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 02938be Rebuilt for libxml-2.15.4