$ git clone -n https://src.fedoraproject.org/rpms/perl-Proc-PID-File.git /var/lib/mock/f45-build-25925-613/root/chroot_tmpdir/scmroot/perl-Proc-PID-File
Cloning into '/var/lib/mock/f45-build-25925-613/root/chroot_tmpdir/scmroot/perl-Proc-PID-File'...
$ git fetch origin 9668d1a3e91cec84604d77e0ae54fbe765391ae2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Proc-PID-File
 * [new ref]         9668d1a3e91cec84604d77e0ae54fbe765391ae2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9668d1a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild