$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-RunValgrind.git /var/lib/mock/f45-build-26829-619/root/chroot_tmpdir/scmroot/perl-Test-RunValgrind
Cloning into '/var/lib/mock/f45-build-26829-619/root/chroot_tmpdir/scmroot/perl-Test-RunValgrind'...
$ git fetch origin 9b86a255d09c60f786b4556fd9799c5255757a45:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-RunValgrind
 * [new ref]         9b86a255d09c60f786b4556fd9799c5255757a45 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9b86a25 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild