$ git clone -n https://src.fedoraproject.org/rpms/perl-Devel-Confess.git /var/lib/mock/f45-build-23074-595/root/chroot_tmpdir/scmroot/perl-Devel-Confess
Cloning into '/var/lib/mock/f45-build-23074-595/root/chroot_tmpdir/scmroot/perl-Devel-Confess'...
$ git fetch origin bd8c1e065fcb258742da88eb28edde6b0ddf6c55:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Devel-Confess
 * [new ref]         bd8c1e065fcb258742da88eb28edde6b0ddf6c55 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bd8c1e0 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild