$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-Class-Most.git /var/lib/mock/f45-build-26556-618/root/chroot_tmpdir/scmroot/perl-Test-Class-Most
Cloning into '/var/lib/mock/f45-build-26556-618/root/chroot_tmpdir/scmroot/perl-Test-Class-Most'...
$ git fetch origin 43b7c867c76b080f2fc596ee4f56c62b6fc3419d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-Class-Most
 * [new ref]         43b7c867c76b080f2fc596ee4f56c62b6fc3419d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 43b7c86 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild