$ git clone -n https://src.fedoraproject.org/rpms/perl-Mail-Box-IMAP4.git /var/lib/mock/f39-build-1440330-32327/root/chroot_tmpdir/scmroot/perl-Mail-Box-IMAP4
Cloning into '/var/lib/mock/f39-build-1440330-32327/root/chroot_tmpdir/scmroot/perl-Mail-Box-IMAP4'...
$ git fetch origin 552c1f95021f11308134e5a9635149a3dd6e2918:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Mail-Box-IMAP4
 * [new ref]         552c1f95021f11308134e5a9635149a3dd6e2918 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 552c1f9 3.008 bump (bug #2230299)