$ git clone -n https://src.fedoraproject.org/rpms/perl-Authen-SASL-SASLprep.git /var/lib/mock/f41-build-787175-13594/root/chroot_tmpdir/scmroot/perl-Authen-SASL-SASLprep
Cloning into '/var/lib/mock/f41-build-787175-13594/root/chroot_tmpdir/scmroot/perl-Authen-SASL-SASLprep'...
$ git fetch origin ee634a36b78973763e88c6016b81320958a8a201:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Authen-SASL-SASLprep
 * [new ref]         ee634a36b78973763e88c6016b81320958a8a201 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ee634a3 Eliminate use of obsolete %patchN syntax (#2283636)