$ git clone -n https://src.fedoraproject.org/rpms/perl-Gnome2-VFS.git /var/lib/mock/f41-build-817008-150570/root/chroot_tmpdir/scmroot/perl-Gnome2-VFS
Cloning into '/var/lib/mock/f41-build-817008-150570/root/chroot_tmpdir/scmroot/perl-Gnome2-VFS'...
$ git fetch origin 417344b506908a807d65331133489a75cce7ffbe:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Gnome2-VFS
 * [new ref]         417344b506908a807d65331133489a75cce7ffbe -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 417344b Perl 5.40 rebuild