$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-Valgrind.git /var/lib/mock/f45-build-26965-620/root/chroot_tmpdir/scmroot/perl-Test-Valgrind
Cloning into '/var/lib/mock/f45-build-26965-620/root/chroot_tmpdir/scmroot/perl-Test-Valgrind'...
$ git fetch origin ce0f1ad05475d2fb2b2460455608859cd98b6237:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-Valgrind
 * [new ref]         ce0f1ad05475d2fb2b2460455608859cd98b6237 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ce0f1ad Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild