$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-Assertions.git /var/lib/mock/f45-build-26555-618/root/chroot_tmpdir/scmroot/perl-Test-Assertions
Cloning into '/var/lib/mock/f45-build-26555-618/root/chroot_tmpdir/scmroot/perl-Test-Assertions'...
$ git fetch origin 520bc3d69cedf9f837752f8a8991f554ddeb8fb8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-Assertions
 * [new ref]         520bc3d69cedf9f837752f8a8991f554ddeb8fb8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 520bc3d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild