$ git clone -n https://src.fedoraproject.org/rpms/rust-escape_string.git /var/lib/mock/f41-build-side-1-3124878-39482/root/chroot_tmpdir/scmroot/rust-escape_string
Cloning into '/var/lib/mock/f41-build-side-1-3124878-39482/root/chroot_tmpdir/scmroot/rust-escape_string'...
$ git fetch origin 16af65e30cd9833a3d993955533801cb9b4aba59:KOJI_FETCH_HEAD
fatal: unable to access 'https://src.fedoraproject.org/rpms/rust-escape_string.git/': OpenSSL SSL_connect: SSL_ERROR_SYSCALL in connection to src.fedoraproject.org:443 
$ git reset --hard 16af65e30cd9833a3d993955533801cb9b4aba59
HEAD is now at 16af65e no longer needed