$ git clone -n https://src.fedoraproject.org/rpms/perl-Test2-Suite.git /var/lib/mock/f40-build-2212923-52299/root/chroot_tmpdir/scmroot/perl-Test2-Suite
Cloning into '/var/lib/mock/f40-build-2212923-52299/root/chroot_tmpdir/scmroot/perl-Test2-Suite'...
$ git fetch origin 2a212871b41ee1ad30e81e299965794630e4a9e4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test2-Suite
 * [new ref]         2a212871b41ee1ad30e81e299965794630e4a9e4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2a21287 0.000159 bump