$ git clone -n https://src.fedoraproject.org/rpms/perl-Tickit.git /var/lib/mock/f40-build-2221581-52689/root/chroot_tmpdir/scmroot/perl-Tickit
Cloning into '/var/lib/mock/f40-build-2221581-52689/root/chroot_tmpdir/scmroot/perl-Tickit'...
$ git fetch origin 17f1c953c0ad3cda6d4c1df22e3aa89917df5c87:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Tickit
 * [new ref]         17f1c953c0ad3cda6d4c1df22e3aa89917df5c87 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 17f1c95 Update .gitignore