$ git clone -n https://src.fedoraproject.org/rpms/perl-Devel-CheckCompiler.git /var/lib/mock/f45-build-23076-595/root/chroot_tmpdir/scmroot/perl-Devel-CheckCompiler
Cloning into '/var/lib/mock/f45-build-23076-595/root/chroot_tmpdir/scmroot/perl-Devel-CheckCompiler'...
$ git fetch origin 147b4f58650fa20168d43c45476975b0530aaeb8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Devel-CheckCompiler
 * [new ref]         147b4f58650fa20168d43c45476975b0530aaeb8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 147b4f5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild