$ git clone -n https://src.fedoraproject.org/rpms/perl-Promises.git /var/lib/mock/f45-build-25955-613/root/chroot_tmpdir/scmroot/perl-Promises
Cloning into '/var/lib/mock/f45-build-25955-613/root/chroot_tmpdir/scmroot/perl-Promises'...
$ git fetch origin 544e0209990e3c272c8c372dbe6c3e1b4e5a5bfe:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Promises
 * [new ref]         544e0209990e3c272c8c372dbe6c3e1b4e5a5bfe -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 544e020 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild