$ git clone -n https://src.fedoraproject.org/rpms/perl-Mail-JMAPTalk.git /var/lib/mock/f45-build-24623-605/root/chroot_tmpdir/scmroot/perl-Mail-JMAPTalk
Cloning into '/var/lib/mock/f45-build-24623-605/root/chroot_tmpdir/scmroot/perl-Mail-JMAPTalk'...
$ git fetch origin 56897982d072412f589fbf2614bd93b243aec826:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Mail-JMAPTalk
 * [new ref]         56897982d072412f589fbf2614bd93b243aec826 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5689798 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild