$ git clone -n https://src.fedoraproject.org/rpms/perl-Authen-SCRAM.git /var/lib/mock/f45-build-21801-588/root/chroot_tmpdir/scmroot/perl-Authen-SCRAM
Cloning into '/var/lib/mock/f45-build-21801-588/root/chroot_tmpdir/scmroot/perl-Authen-SCRAM'...
$ git fetch origin 7069cdc97712eda9ee18f8bf9e8c4f9e0b8e4215:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Authen-SCRAM
 * [new ref]         7069cdc97712eda9ee18f8bf9e8c4f9e0b8e4215 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7069cdc Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild