$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-Regression.git /var/lib/mock/f45-build-26824-619/root/chroot_tmpdir/scmroot/perl-Test-Regression
Cloning into '/var/lib/mock/f45-build-26824-619/root/chroot_tmpdir/scmroot/perl-Test-Regression'...
$ git fetch origin 3de4f5f501ea6c9a324a8f5a93f707508f03696f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-Regression
 * [new ref]         3de4f5f501ea6c9a324a8f5a93f707508f03696f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3de4f5f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild