$ git clone -n https://src.fedoraproject.org/rpms/perl-Devel-StringInfo.git /var/lib/mock/f45-build-23189-596/root/chroot_tmpdir/scmroot/perl-Devel-StringInfo
Cloning into '/var/lib/mock/f45-build-23189-596/root/chroot_tmpdir/scmroot/perl-Devel-StringInfo'...
$ git fetch origin cccab7f6ed06402669a440875663c8669ea3c0ed:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Devel-StringInfo
 * [new ref]         cccab7f6ed06402669a440875663c8669ea3c0ed -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cccab7f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild