$ git clone -n https://src.fedoraproject.org/rpms/perl-Scope-Guard.git /var/lib/mock/f45-build-26188-616/root/chroot_tmpdir/scmroot/perl-Scope-Guard
Cloning into '/var/lib/mock/f45-build-26188-616/root/chroot_tmpdir/scmroot/perl-Scope-Guard'...
$ git fetch origin 24586fa5d7ff6d62cfaeb4a8e122d50c7eeac6bc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Scope-Guard
 * [new ref]         24586fa5d7ff6d62cfaeb4a8e122d50c7eeac6bc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 24586fa Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild