$ git clone -n https://src.fedoraproject.org/rpms/perl-PDF-Reuse.git /var/lib/mock/f41-build-1107972-20090/root/chroot_tmpdir/scmroot/perl-PDF-Reuse
Cloning into '/var/lib/mock/f41-build-1107972-20090/root/chroot_tmpdir/scmroot/perl-PDF-Reuse'...
$ git fetch origin 899bd56b4037f351c734c68b40a4c0d2d810648c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-PDF-Reuse
 * [new ref]         899bd56b4037f351c734c68b40a4c0d2d810648c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 899bd56 Eliminate use of obsolete %patchN syntax (#2283636)