$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-Assertions.git /var/lib/mock/f39-build-1435136-31971/root/chroot_tmpdir/scmroot/perl-Test-Assertions
Cloning into '/var/lib/mock/f39-build-1435136-31971/root/chroot_tmpdir/scmroot/perl-Test-Assertions'...
$ git fetch origin dafa47aa5a2faf303abe07d365ab762e31bb8163:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-Assertions
 * [new ref]         dafa47aa5a2faf303abe07d365ab762e31bb8163 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dafa47a Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild