$ git clone -n https://src.fedoraproject.org/rpms/perl-Syntax-Operator-In.git /var/lib/mock/f45-build-26430-617/root/chroot_tmpdir/scmroot/perl-Syntax-Operator-In
Cloning into '/var/lib/mock/f45-build-26430-617/root/chroot_tmpdir/scmroot/perl-Syntax-Operator-In'...
$ git fetch origin ceae8b7f11fa9563008bda9b1b70fdde4b42c162:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Syntax-Operator-In
 * [new ref]         ceae8b7f11fa9563008bda9b1b70fdde4b42c162 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ceae8b7 Perl 5.44 rebuild