$ git clone -n https://src.fedoraproject.org/rpms/perl-Authen-SASL-SASLprep.git /var/lib/mock/f45-build-21838-588/root/chroot_tmpdir/scmroot/perl-Authen-SASL-SASLprep
Cloning into '/var/lib/mock/f45-build-21838-588/root/chroot_tmpdir/scmroot/perl-Authen-SASL-SASLprep'...
$ git fetch origin 8fb7817e0ef66548dee42bee7eee0928c3aaf204:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Authen-SASL-SASLprep
 * [new ref]         8fb7817e0ef66548dee42bee7eee0928c3aaf204 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8fb7817 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild