$ git clone -n https://src.fedoraproject.org/rpms/perl-App-Yath-Script.git /var/lib/mock/f45-build-21709-587/root/chroot_tmpdir/scmroot/perl-App-Yath-Script
Cloning into '/var/lib/mock/f45-build-21709-587/root/chroot_tmpdir/scmroot/perl-App-Yath-Script'...
$ git fetch origin 07235a7a8e030bc6091fa9353eee0ab51ce1e40f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-App-Yath-Script
 * [new ref]         07235a7a8e030bc6091fa9353eee0ab51ce1e40f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 07235a7 2.000017 bump