$ git clone -n https://src.fedoraproject.org/rpms/perl-Tk-ProgressBar-Mac.git /var/lib/mock/f45-build-27232-621/root/chroot_tmpdir/scmroot/perl-Tk-ProgressBar-Mac
Cloning into '/var/lib/mock/f45-build-27232-621/root/chroot_tmpdir/scmroot/perl-Tk-ProgressBar-Mac'...
$ git fetch origin c0a39a88d0704eb414371db097702e420b9fa1a7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Tk-ProgressBar-Mac
 * [new ref]         c0a39a88d0704eb414371db097702e420b9fa1a7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c0a39a8 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild