$ git clone -n https://src.fedoraproject.org/rpms/R-memoise.git /var/lib/mock/f45-build-6225-347/root/chroot_tmpdir/scmroot/R-memoise
Cloning into '/var/lib/mock/f45-build-6225-347/root/chroot_tmpdir/scmroot/R-memoise'...
$ git fetch origin 14753488d086d8cb6323b3f2035b49cce6a3279e:KOJI_FETCH_HEAD
fatal: unable to access 'https://src.fedoraproject.org/rpms/R-memoise.git/': Failed to connect to src.fedoraproject.org port 443 after 3655 ms: Could not connect to server
$ git reset --hard 14753488d086d8cb6323b3f2035b49cce6a3279e
HEAD is now at 1475348 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild