$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-Smoke.git /var/lib/mock/f45-build-26855-619/root/chroot_tmpdir/scmroot/perl-Test-Smoke
Cloning into '/var/lib/mock/f45-build-26855-619/root/chroot_tmpdir/scmroot/perl-Test-Smoke'...
$ git fetch origin 6f6a64b3f0e72bbd6d3a2f84c0276500047ce422:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-Smoke
 * [new ref]         6f6a64b3f0e72bbd6d3a2f84c0276500047ce422 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6f6a64b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild