$ git clone -n https://src.fedoraproject.org/rpms/perl-IPC-SysV.git /var/lib/mock/f45-build-24213-602/root/chroot_tmpdir/scmroot/perl-IPC-SysV
Cloning into '/var/lib/mock/f45-build-24213-602/root/chroot_tmpdir/scmroot/perl-IPC-SysV'...
$ git fetch origin af614f652dd3b694e65ab058591381dec2debce6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-IPC-SysV
 * [new ref]         af614f652dd3b694e65ab058591381dec2debce6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at af614f6 Perl 5.44 re-rebuild of bootstrapped packages