$ git clone -n https://src.fedoraproject.org/rpms/mingw-libxml2.git /var/lib/mock/f40-build-2612380-63998/root/chroot_tmpdir/scmroot/mingw-libxml2
Cloning into '/var/lib/mock/f40-build-2612380-63998/root/chroot_tmpdir/scmroot/mingw-libxml2'...
$ git fetch origin 40ce53aab503886b0393e9a7053d10740ba7fbaa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mingw-libxml2
 * [new ref]         40ce53aab503886b0393e9a7053d10740ba7fbaa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 40ce53a Update to 2.12.5